OnCallGrid Academy

Practical industrial maintenance education from the field.

Learn PLCs, electrical systems, automation, troubleshooting, and reliability — one episode at a time.

Maintenance Fundamentals

Series index →
  • EP 001
    What is a PLC?
    Apprentice
  • EP 002
    Digital Inputs vs Digital Outputs
    Apprentice
    Coming Soon
  • EP 003
    How a Sensor Talks to a PLC
    Apprentice
    Coming Soon
  • EP 004
    Motor Starter vs Contactor vs Overload
    Technician
    Coming Soon
  • EP 005
    Reading a Basic Wiring Diagram
    Technician
    Coming Soon
  • EP 006
    What is a VFD and Why Does It Matter
    Technician
    Coming Soon
  • EP 007
    Analog Signals — 0-10V vs 4-20mA
    Technician
    Coming Soon
  • EP 008
    Why an E-Stop Doesn't Always Mean the Machine Is Broken
    Advanced
    Coming Soon
  • EP 009
    How to Troubleshoot a Conveyor Fault Step by Step
    Advanced
    Coming Soon
  • EP 010
    PLC → SCADA → CMMS → OnCallGrid
    Advanced
    Coming Soon

Every repair. Remembered. Ready.